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After the 1940s, state-based support for geologic mapping in Louisiana dwindled,
essentially ending the initial period of modern geologic mapping in the state.
Since then, the Louisiana Geological Survey had been unable to meet most routine
requests for geologic maps from state agencies, developers, city planners and
the public. Recently, the survey began a regular program for surface-geologic
mapping with funding assistance from the STATEMAP component of the U.S. Geological
Surveys (USGS) National Cooperative Geologic Mapping Program. The Louisiana
Geological Survey intends to compile surface geology maps in 1:100,000-scale
quadrangle format for the entire state, beginning in south Louisiana. The primary
tool will be source maps created during intermediate-scale mapping projects
funded by the USGS in portions of the state above the coastal zone over the
last 10 or so years. To date, the survey has produced the four 30-by-60-minute
geologic quadrangles listed below. Two more, Crowley and Ponchatoula, are slated
for production in the spring.

To order these and other maps from the Louisiana Geological Survey,
write to LGS, P.O. Box G, Baton Rouge, LA 70893. Or call 225-578-8590.
U.S. Geological Survey

I-2719. MISSOURI. Geologic map of the Low Wassie quadrangle, Oregon and
Shannon Counties, Missouri by R.E. Weems. 2002. Scale 1:24,000. One color
sheet 54 by 40 inches. The Low Wassie quadrangle, in south-central Missouri,
lies within the Salem Plateau astride the Current River-Eleven Point River divide,
and includes part of the Mark Twain National Forest. This area is of special
interest for its subsurface lead-ore potential. The map and text describe the
surface geology (mostly Ordovician dolomite, Pleistocene loess and terrace deposits).
Also included are structure contour maps of the base of the subsurface Cambrian
units. Available for $7 from USGS Information Services.

I-2723. CALIFORNIA. Geologic map of the Lassen Peak, Chaos Crags, and Upper
Hat Creek area, California by R.L. Christiansen, M.A. Clynne and L.J.P.
Muffler. 2002. Scale 1:24,000. One color sheet 56 by 36 inches with 17-page
text. Products of the youngest volcanism of the Lassen region are exposed in
Lassen Volcanic National Park and its vicinity. The map delineates areas affected
by the 1914 to 1917 eruptions of Lassen Peak and by the approximately 1,000-year-old
volcanism associated with the Chaos Crags. An inset map at a scale of 1:2,500
shows geologic relations in the Lassen Peak summit area. Available for $7 from
USGS Information Services.

HA-748. WYOMING. Potentiometric surfaces, altitudes of the tops, and hydrogeology
of the Minnelusa and Madison aquifers, Black Hills area, Wyoming by T.T.
Bartos, L.L. Hallberg and K.M. Ogle. Prepared in cooperation with the Wyoming
State Engineers Office. 2002. Scale 1:100,000. Four color sheets 42 by
34 inches. Characteristics of the aquifers are described from earlier studies.
Continuous water-level measurements at three locations with paired monitoring
wells completed in both aquifers are examined. The relative age of groundwater
samples collected from a selected number of wells completed in both aquifers
is discussed. Available online,
or for $14 from USGS Information Services.

MF-2395. WASHINGTON. Geologic map of the Battle Ground 7.5-minute quadrangle,
Clark County, Washington by K.A. Howard. 2002. Scale 1:24,000. One color
sheet 30 by 35 inches with 18-page text. Available at geopubs.wr.usgs.gov/map-
mf/mf2395, or for $20 from USGS Information Services.

I-2540-C. NEW JERSEY. Surficial geologic map of northern New Jersey by
B.D. Stone, S.D. Stanford and R.W. Witte. 2002. Scale 1:100,000. Three color
sheets that are 58 by 41 inches, 53 by 41 inches and 48 by 40 inches with 41-page
text. Available for $14 from USGS Information Services.